test_support_content requires webkit_support_common, add the dependency explictely

content/content_tests.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'targets': [
     {
       'target_name': 'test_support_content',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],
@@ skipping 155 matching lines @@
             'content_worker',
             '../ppapi/ppapi_internal.gyp:ppapi_host',
             '../ppapi/ppapi_internal.gyp:ppapi_proxy',
             '../ppapi/ppapi_internal.gyp:ppapi_shared',
             '../ppapi/ppapi_internal.gyp:ppapi_unittest_shared',
             '<(webkit_src_dir)/Source/WebKit/chromium/WebKit.gyp:webkit',
             '<(webkit_src_dir)/Tools/DumpRenderTree/DumpRenderTree.gyp/DumpRenderTree.gyp:TestRunner',
             '../ui/surface/surface.gyp:surface',
             '../webkit/compositor_bindings/compositor_bindings.gyp:webkit_compositor_support',
             '../webkit/support/webkit_support.gyp:webkit_storage',
+            '../webkit/support/webkit_support.gyp:webkit_support_common',
           ],
         }],
         ['OS == "win" or (toolkit_uses_gtk == 1 and selinux == 0)', {
           'dependencies': [
             '../sandbox/sandbox.gyp:sandbox',
           ],
         }],
         ['enable_webrtc==1', {
           'sources': [
             'renderer/media/mock_media_stream_dependency_factory.cc',
@@ skipping 857 matching lines @@
             'additional_src_dirs': ['../content/public/android/javatests/',],
             'resource_dir': '../shell_apk/res',
             'is_test_apk': 1,
           },
           'includes': [ '../build/java_apk.gypi' ],
         },
       ],
     }],
   ],
 }